.form {
    display: flex;
}

.form>div {
    display: inline-block;
    vertical-align: top;
}

#treeviewDriveC,
#treeviewDriveD {
    margin-top: 10px;
}

.drive-header {
    min-height: auto;
    padding: 0px;
    cursor: default;
}

.drive-header .dx-icon {
    margin-top: -4px;
}

.drive-panel {
    padding: 20px 30px;
    font-size: 115%;
    font-weight: bold;
    border-right: 1px solid rgba(165, 165, 165, 0.4);
    height: 100%;
}

.drive-panel:last-of-type {
    border-right: none;
}